10x Black PP Hex Plastic Nuts Bolts, Washers, M12 x 70mm, Anti-Corrosion Product Highlights Slippery at the molecular level, it does have a relatively high coefficient of friction. Polypropylene possesses good fatigue resistance. Does not break when repeatedly bent and Polypropylene is very resistant to absorbing moisture. Polypropylene has good chemical resistance over a wide range of bases and acids. Polypropylene has good impact strength. Polypropylene is a good electrical insulator 10x Black nuts, 10x washers, 10x bolts M12 x 70mm, Hexagon Head Bolts. Water Resistant, Anti-Corrosion, Chemical Resistant, Strong. Product Description APPLICATIONS: Polypropylene is an economical material that offers a combination of outstanding physical, chemical, mechanical, thermal and electrical properties not found in any other thermoplastic.